John deere js63

I recently bought a used js63. Used it once and LOVED it, mostly because I'd spent 6 weeks prior with a craftsman with broken self propelled. Today, second time, tried starting and entire pull cord snaps out. I replace using a YouTube video as a guide and fire that puppy up and I'm feeling like a beast and so proud of my skills. 6 rows left of front yard and the thing starts a funky rattling and then craps out on me and begins smoking....wtf. I'm thinking I've ignited the new pull cord but can't tell because now I can't get it to pull at all. Any ideas? And yes I am new and a woman and this blows:(((